you can stack as many lighthouse units as you want in an arbitrary configuration (which will kill for having huge spaces spanning multiple rooms). i believe the

you can stack as many lighthouse units as you want in an arbitrary configuration (which will kill for having huge spaces spanning multiple rooms). i believe the vive headset demo had 2 or 3 units covering 15x15 feet area. they also have sub millimeter accuracy, to the point that people can pick up physical objects mapped in 3d space, which was how valve demoed picking up the vive controllers whilst you had the helmet on, so you saw the controllers in the 3d space, and they were exactly where they were in meatspace.